• CN:11-2187/TH
  • ISSN:0577-6686

机械工程学报 ›› 2025, Vol. 61 ›› Issue (20): 165-173.doi: 10.3901/JME.2025.20.165

• 可再生能源与工程热物理 • 上一篇    

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基于B样条的气膜冷却孔参数化及性能优化研究

张传亮, 刘瑞, 宋权斌, 王子艺   

  1. 长沙理工大学能源与动力工程学院 长沙 410114
  • 收稿日期:2024-12-13 修回日期:2025-06-24 发布日期:2025-12-03
  • 作者简介:张传亮,男,2001年出生。主要研究方向为传热传质及节能技术。E-mail:zchuanl2001@163.com
    刘瑞(通信作者),男,1986年出生,博士,讲师,硕士研究生导师。主要研究方向为动力机械建模与仿真、动力机械状态监测与故障诊断。E-mail:Liurui200472156@126.com
  • 基金资助:
    湖南省自然科学基金(2024JJ9177)资助项目。

Study on the Parameterization and Performance Optimization of Film Cooling Holes Based on B-Splines

ZHANG Chuanliang, LIU Rui, SONG Quanbin, WANG Ziyi   

  1. College of Energy and Power Engineering, Changsha University of Science & Technology, Changsha 410114
  • Received:2024-12-13 Revised:2025-06-24 Published:2025-12-03

摘要: 气膜冷却作为涡轮叶片中一种行之有效的冷却技术,其中气膜冷却孔的出口孔形对气膜冷却效率的提升具有重要影响。采用B样条曲线对气膜冷却孔进行参数化建模,设计了由11个控制变量定义的B样条曲线来精确调控孔形结构,并结合CFD数值模拟和优化算法进行全局优化。研究结果表明,最优孔形相比于扇形孔在前缘区域表现出向内收缩并展向扩张的特征,后缘则呈现类似于心形孔的内凹特征。该孔形结合了心形孔与扇形孔在气膜冷却性能上的优势,在流向方向上提高了中心气膜冷却强度,在展向方向的覆盖能力得以加强,表现出优异的气膜冷却性能。在吹风比M=1条件下,与扇形孔相比,最优孔形的气膜冷却效率提高了13.6%,均匀性指数提升了5.11%。研究提出B样条参数化与优化算法全局寻优的气膜冷却孔形设计方法,为涡轮叶片气膜冷却优化设计提供了有价值的参考。

关键词: 气膜冷却, B样条曲线, 最优孔形, 优化算法, 均匀性指数

Abstract: Film cooling is an effective cooling technique for cooling turbine blades, where the shape of the outlet holes plays a critical role in enhancing cooling efficiency. Parametric modeling of the film cooling holes is performed using B-spline curves, which are defined by 11 control variables to precisely control the hole shape. This is combined with CFD numerical simulation and optimization algorithm for global optimization. The results show that the optimized hole shape exhibits inward contraction and outward expansion at the leading edge compared to the fan-shaped hole, while the trailing edge shows a concave feature similar to the heart-shaped hole. This hole shape combines the advantages of both heart-shaped and fan-shaped holes with respect to film cooling performance. It increases the cooling intensity at the center along the flow direction and improves coverage in the spanwise direction, demonstrating excellent film cooling performance. Under a blowing ratio of M=1, the film cooling efficiency of the optimal hole shape increases by 13.6% compared to the fan-shaped hole, while the uniformity index improves by 5.11%. The study proposes a B-spline parameterization and optimization algorithm for the global optimization of film cooling hole designs, providing valuable insights for the optimization design of turbine blade film cooling.

Key words: film cooling, B-spline curves, optimal hole shape, optimization algorithm, uniformity index

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